Graco LineLazer ES 1000 Operation - Repair - Parts page 30

Troubleshooting
Problem
Sprayer does not run at all
AND
Control board status light blinks 6
times repeatedly
Basic electrical problems
Inverter will not turn on during initial
power up.
30
What to Check
Motor is hot or there is a fault in
the motor thermal device.
Motor leads are securely
fastened and properly mated
Motor armature commutator for
burn spots, gouges or extreme
roughness.
Batteries are not connected,
loose battery-side connections
Low battery voltage below 10V
How to check
6. Perform Field Short Test: Test at large 4-pin motor
field connector. There should not be continuity from
pin 4, the ground wire, and any of the remaining
3 pins. If motor field connector tests fail,
replace motor.
7. Check Motor Thermal Switch: Unplug thermal
wires. Set meter to ohms. Meter should read 100k
ohms.
1-3 ohms
-
8. Reconnect motor connector(s) to control board
socket(s). Connect power, turn ON/OFF switch ON
and control knob to 1/2 turn clockwise. If motor does
not run, replace control board.
Allow sprayer to cool. If sprayer runs when cool, correct
cause of overheating. Keep sprayer in cooler location
with good ventilation. Make sure motor air intake is not
blocked. If sprayer still does not run, replace motor.
NOTE: Motor must be cooled down for the test.
1. Check thermal device connector (yellow wires)
at control board.
2. Disconnect thermal device connector from control
board socket. Make sure contacts are clean and
secure. Measure resistance of the thermal device. If
reading is not correct, replace motor.
Check Motor Thermal Switch: Unplug thermal wires.
Set meter to ohms. Meter should read 100k ohms.
3. Reconnect thermal device connector to control
board socket. Connect power, turn sprayer ON and
control knob 1/2 turn clockwise. If sprayer does not
run, replace control board.
Replace loose terminals; crimp to leads. Be sure
terminal are firmly connected.
Clean circuit board terminals. Securely reconnect leads.
Remove motor and have motor shop resurface
commutator if possible.
Check the batteries and cable connections. Check DC
fuse and breaker.
Charge the battery with external charger (not charger on
board the unit).
3A4603C Operation, Repair, Parts